STUDY OF PHOTON DISSOCIATION IN DIFFRACTIVE PHOTOPRODUCTION AT HERA

Authors
BREITWEG J DERRICK M KRAKAUER D MAGILL S MIKUNAS D MUSGRAVE B REPOND J STANEK R TALAGA RL YOSHIDA R ZHANG H MATTINGLY MCK ANSELMO F ANTONIOLI P BARI G BASILE M BELLAGAMBA L BOSCHERINI D BRUNI A BRUNI G ROMEO GC CASTELLINI G CIFARELLI L CINDOLO F CONTIN A CORRADI M DEPASQUALE S GIALAS I GIUSTI P IACOBUCCI G LAURENTI G LEVI G MARGOTTI A MASSAM T NANIA R PALMONARI F PESCI A POLINI A SARTORELLI G GARCIA YZ ZICHICHI A AMELUNG C BORNHEIM A BROCK I COBOKEN K CRITTENDEN J DEFFNER R ECKERT M FELD L GROTHE M HARTMANN H HEINLOTH K HEINZ L HILGER E JAKOB HP KATZ UF PAUL E PFEIFFER M REMBSER C STAMM J WEDEMEYER R BAILEY DS CAMPBELLROBSON S COTTINGHAM WN FOSTER B HALLWILTON R HAYES ME HEATH GP HEATH HF PICCIONI D ROFF DG TAPPER RJ ARNEODO M AYAD R CAPUA M GARFAGNINI A IANNOTTI L SCHIOPPA M SUSINNO G KIM JY LEE JH LIM IT PAC MY CALDWELL A CARTIGLIA N JING Z LIU W PARSONS JA RITZ S SAMPSON S SCIULLI F STRAUB PB ZHU Q BORZEMSKI P CHWASTOWSKI J ESKREYS A JAKUBOWSKI Z PRZYBYCIEN MB ZACHARA M ZAWIEJSKI L ADAMCZYK L BEDNAREK B JELEN K KISIELEWSKA D KOWALSKI T PRZYBYCIEN M RULIKOWSKAZAREBSKA E SUSZYCKI L ZAJAC J DULINSKI Z KOTANSKI A ABBIENDI G BAUERDICK LAT BEHRENS U BEIER H BIENLEIN JK CASES G DEPPE O DESLER K DREWS G FRICKE U GILKINSON DJ GLASMAN C GOTTLICHER P GROSSEKNETTER J HAAS T HAIN W HASELL D HESSLING H JOHNSON KF KASEMANN M KOCH W KOTZ U KOWALSKI H LABS J LINDEMANN L LOHR B LOWE M MAINUSCH J MANCZAK O MILEWSKI J MONTEIRO T NG JST NOTZ D OHRENBERG K PARK IH PELLEGRINO A PELUCCHI F PIOTRZKOWSKI K ROCO M ROHDE M ROLDAN J RYAN JJ SAVIN AA SCHNEEKLOTH U SCHULZ W SELONKE F SURROW B TASSI E VOSS T WESTPHAL D WOLF G WOLLMER U YOUNGMAN C ZARNECKI AF ZEUNER W BUROW BD GRABOSCH HJ MEYER A SCHLENSTEDT S BARBAGLI G GALLO E PELFER P MACCARRONE G VOTANO L BAMBERGER A EISENHARDT S MARKUN P TREFZGER T WOLFLE S BROMLEY JT BROOK NH BUSSEY PJ DOYLE AT SAXON DH SINCLAIR LE STRICKLAND E UTLEY ML WAUGH R WILSON AS BOHNET I GENDNER N HOLM U MEYERLARSEN A SALEHI H WICK K GLADILIN LK KLANNER R LOHRMANN E POELZ G SCHOTT W ZETSCHE F BACON TC BUTTERWORTH I COLE JE HARRIS VL HOWELL G HUNG BHY LAMBERTI L LONG KR MILLER DB PAVEL N PRINIAS A SEDGBEER JK SIDERIS D WHITFIELD AF MALLIK U WANG SM WU JT CLOTH P FILGES D FLECK JI ISHII T KUZE M NAKAO M TOKUSHUKU K YAMADA S YAMAZAKI Y AN SH LEE SB NAM SW PARK HS PARK SK BARREIRO F FERNANDEZ JP GRACIANI R HERNANDEZ JM HERVAS L LABARGA L MARTINEZ M DELPESO J PUGA J TERRON J DETROCONIZ JF CORRIVEAU F HANNA DS HARTMANN J HUNG LW LIM JN MURRAY WN OCHS A RIVELINE M STAIRS DG STLAURENT M ULLMANN R TSURUGAI T BASHKIROV V DOLGOSHEIN BA STIFUTKIN A BASHINDZHAGYAN GL ERMOLOV PF GOLUBKOV YA KHEIN LA KOROTKOVA NA KORZHAVINA LA KUZMIN VA LUKINA OY PROSKURYAKOV AS SHCHEGLOVA LM SHUMILIN AV SOLOMIN AN ZOTKIN SA BOKEL C BOTJE M BRUMMER N CHLEBANA F ENGELEN J KOOIJMAN P KRUSE A VANSIGHEM A TIECKE H VERKERKE W VOSSEBELD J VREESWIJK M WIGGERS L DEWOLF E ACOSTA D BYLSMA B DURKIN LS GILMORE J GINSBURG CM KIM CL LING TY NYLANDER P ROMANOWSKI TA BLAIKLEY HE CASHMORE RJ COOPERSARKAR AM DEVENISH RCE EDMONDS JK HARNEW N LANCASTER M MCFALL JD NATH C NOYES VA QUADT A TICKNER JR UIJTERWAAL H WALCZAK R WATERS DS YIP T BERTOLIN A BRUGNERA R CARLIN R DALCORSO F DOSSELLI U LIMENTANI S MORANDIN M POSOCCO M STANCO L STROILI R VOCI C BULMAHN J FEILD RG OH BY OKRASINSKI JR WHITMORE JJ IGA Y DAGOSTINI G MARINI G NIGRO A RASO M HART JC MCCUBBIN NA SHAH TP BARBERIS E DUBBS T HEUSCH C VANHOOK M LOCKMAN W RAHN JT SADROZINSKI HFW SEIDEN A WILLIAMS DC SCHWARZER O WALENTA AH ABRAMOWICZ H BRISKIN G DAGAN S DOEKER T KANANOV S LEVY A ABE T INUZUKA M NAGANO K SUZUKI I UMEMORI K HAMATSU R HIROSE T HOMMA K KITAMURA S MATSUSHITA T YAMAUCHI K CIRIO R COSTA M FERRERO MI MASELLI S MONACO V PERONI C PETRUCCI MC SACCHI R SOLANO A STAIANO A DARDO M BAILEY DC BRKIC M FAGERSTROEM CP HARTNER GF JOO KK LEVMAN GM MARTIN JF ORR RS POLENZ S SAMPSON CR SIMMONS D TEUSCHER RJ BUTTERWORTH JM CATTERALL CD JONES TW KAZIEWICZ PB LANE JB SAUNDERS RL SHULMAN J SUTTON MR LU B MO LW CIBOROWSKI J GRZELAK G KASPRZAK M MUCHOROWSKI K NOWAK RJ PAWLAK JM PAWLAK R TYMIENIECKA T WROBLEWSKI AK ZAKRZEWSKI JA ADAMUS M COLDEWEY C EISENBERG Y HOCHMAN D KARSHON U REVEL D BADGETT WF CHAPIN D CROSS R DASU S FOUDAS C LOVELESS RJ MATTINGLY S REEDER DD SMITH WH VAICIULIS A WODARCZYK M BHADRA S FRISKEN WR KHAKZAD M SCHMIDKE WB
Citation
J. Breitweg et al., STUDY OF PHOTON DISSOCIATION IN DIFFRACTIVE PHOTOPRODUCTION AT HERA, Zeitschrift fur Physik. C, Particles and fields, 75(3), 1997, pp. 421-435
Citations number
44
Categorie Soggetti
Physics, Particles & Fields
Journal title
Zeitschrift fur Physik. C, Particles and fields → ACNP
ISSN journal
01709739
Volume
75
Issue
3
Year of publication
1997
Pages
421 - 435
Database
ISI
SICI code
0170-9739(1997)75:3<421:SOPDID>2.0.ZU;2-H
Abstract
Diffractive dissociation of quasi-real photons at a photon-proton cent re of mass energy of W approximate to 200 GeV is studied with the ZEUS detector at HERA. The process under consideration is gamma p --> XN, where X is the diffractively dissociated photon system of mass M-X and N is either a proton or a nucleonic system with mass M-N < 2 GeV. The cross section for this process in the interval 3 < M-X < 24 GeV relat ive to the total photoproduction cross section was measured to be sigm a(D)(partial)/sigma(tot) = 6.2 +/- 0.2(stat) +/- 1.4(syst)%. After ext rapolating this result to the mass interval of m(phi)(2) < M-X(2) < 0. 05W(2) and correcting it for proton dissociation, the fraction of the total cross section attributed to single diffractive photon dissociati on, gamma p --> Xp, is found to be sigma(SD)/sigma(tot) = 13.3 +/- 0.5 (stat) +/- 3.6(syst)%. The mass spectrum of the dissociated photon sys tem in the interval 8 < M-X < 24 GeV can be described by the triple po meron (IP IP IP) diagram with an effective pomeron intercept of alpha( IP)(0) = 1.12 +/- 0.04(stat) +/- 0.08(syst). The cross section for pho ton dissociation in the range 3 < Mr < 8 GeV is significantly higher t han that expected from the triple pomeron amplitude describing the reg ion 8 < Mr < 24 GeV. Assuming that this discrepancy is due to a pomero n-pomeron-reggeon (IP IP IR term, its contribution to the diffractive cross section in the interval 3 < Mr < 24 GeV is estimated to be f(IP IP IR) = 26 +/- 3(stat) +/- 12(syst)%.